Alarm apparatus.



W. H. KLRNAN.

v ALARM APPARATUS. APPLIOATION FILED 133.021.1908.

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ALARM APPARATUS.

- APPLICATION FILED DEG.21.1908. 91. 8, 1 64. Patented Apr. 13, 1909.

2 SHEETS-SHEET 2.

When the lever 28 is in the depressed position shown, the pawl 27 is engaged by the lug so as to stop the Thelever 28 is held indepressed position by spring 29 and the vpawl 27 when not in engagement with the lug 26 is drawn forward by the spring 30 until itslaterally roj-ecting arm engages the pin 31 upon the ever 28. The lever 28 carries a pin 32 which engages with a cam surface 33 carried by'the main gear l.- The cam 33 has two diametricallyopposite slots, as shown in Fig. 1. When the lever 28 is raised by pulling the hook 34 downward, the pawl 27' is withdrawn from the lug 26 and if the magnet 10 is energized, the train begins tomove.

The pin 32 then rides upon the outer surface of the cam 33 and holds the lever 28 in elevated position until the next recess in the earn comes around, at which time the lever 28, unless otherwise restrained descendsso that the pawl 27 lies in the path of the lug 26.

. The gears are so proportioned that one-half revolution of the gear-1 produces i'our revolutionsof the gear 3. The signal wheel 35 is connected to the shaft of the gear 3 and therefore revolves fourtinies whenever the hook 34 is pulled. The wheel 35 has projections 36 corres ending to the call number of the box. In t e call born the number is ,thirtynive, there being three projections 36 followed by a space, which is followed byfive other projections 36.

When the pin 19 is in the position shown, the projections 36 as the wheel 35 revolves engage the pin 19 and. force the controller 23 against the s ring contact 24 so as to separate it from t econtact 25, first three times,

then after a short pause five times, sending If, however, thec1r cult through the magnet 10 18 broken after in the call of the-box.

the box has started but before the first pro- .ljection 36 reaches the pin 19, the armature 11 will be fully retracted, and the pin 1 9 will be moved so as to lie within the circumfer ence describedby theinner portions of the projections 36. The projections 36 will therefore pass the pin 19 without touching thesanie or affecting the contact 24.

" a cam surface on the wheel 35, which when the pin 19 lies within the inner circumference described by the projections 36 engages.-

;the pin I Qandforces it outward, bringing the armature 11 into the field of the magnet 10, so as to beattr-acted thereby if the magnet lil'i's energized. If in the next revolu tion of the wheel 35, the first projection; 36'

above the lug 2,6.

reaches the pin 1.9,bei'ore the magnet 10 has become denergized for any cause the wheel 35 will engage the pin 19 and actuate the spring contact 24 so as-to send in its signal, except under other conditions hereinafter described.

The outer end of the cam 37 "forms a projection so located that when the magnet 10 is deenergized and continues'to be. dener gized tor some little time, as for instance,

when the circuit is broken on account of repairs being made, the pin 20 at the lower end ol the member 160011168 into the path of the projection 21 upon the fan 22 thereby restraining thesanie together with the train from movement. This inward movement of; the pin 19 is sufficient to carry a'spring pawl 38 mounted on the arin 39 inward so as to engage the end oi the lever28 when the same is raised by the hook 34 and hold it in elevated position.

The pawl 38 is pivoted to the arm 39 and is held in normal position by the spring 40 bearing on'its rear side.

the repairing of its circuit, the magnet l0 is denergized at the time hook 34 is pulled, the pawl 38 holds the lever in elevated position until the magnet is again deenergized. The train meanwhile being restrained from movement by the engagementof the pin 20 with the pin 21, as above described. As' soon as the magnet 10- is again energized, the lever 28 is released by the pawl 38 and the pin 20 is moved out of the path of the pin 21. The lever 28 is however still held .in raised position because the pawl 27 has been moved byits spring 30 so as to be The train therefore free tooperate and send in a signal of the box although the lever 34 was pulled during the repair intermission. Before the lug 1passes from beneath the pawl 27, the in 32 as engaged" the cam 33' so as toho d the lever 28 e vvated after the-lug 26 has passed from beneath the pawl 27.; I l1.isa-lug-also carried/by the signal wheel 35*with the inner side of which the pin. 19engage s under certain" circumstances. This h1g4]. is so located that when the-pin it) is in engage ment therewith, it-prevents the armature 13. from bein draw aw 38 from lever .28, but does, not hold tie pin 20 in the path of the pin 2-1 so as to stop themoveinent of the train during the starting of the operation. thus insures against having the pawl 27 drop so as to engage the edge oflug 26st the end of a silent cycle so that aftera silent cycle four audible calls will be sent in.

After the hook 34: has been pulled, the pawl 27 will ride on the outer surface of the lug 26 and will'keep the pointoi'l the lever 28 slightly elevated above the detent 38 until the earn engages the pin 32, which engagement takes place 3118i? before the pawl The lug 4:1

If on account oi lie fully attracted, so as to Qwith-- "1o ili'eleyates the l'eYer-28so as torelease the 30 some other signal box," the operation ofv the "65 be engaged by'the first projection, 36 onthe.

27 leavesthe lhg'l26; In some cases it is desired toihavethe'boX sto at-the end-of four"round sl' In such cases t e members 38',

' 40 and 41 and the-lowerpart'ofBQ oan bs 5 omitted. Y.

The operation is as follows; First assuin'e fthat the circuit through .the magnet .10 is. closed-s that-the armatureul 1 will be attrected thereby? Whenthe hook 34 is pulled,

" awl :27 from its en'gagement with the lug 26'.- lhis: causes the lever 28 to rise sufiioiently to lea-r the lug 26L The'd isengagement of, th

to move and continu will engagei with the 'projections. 36 and the earn-41 on the whe 1 35-.. At each engage'+.

'mentof the pin 19 with'theprojections 36}.-

the contacts 24-and 253-w-ill beiseparcted, thereby causing the signal call number thirty firce to'be transmitted over the. circuit. This movement" continue its performance thirty five into' the next recess theeam. early enough to permit thepawl 27to-i-engage1 the earlier engagement from the operation" ofsecond- .box pulled" will-be as follows; After. being releasedbyihe hook 3 1-, the-armature. V 11 if the circuit at that time isjo'pen wilhhe partially retracted by spring 14 to a distanceee-allowedby the outer end ofthe earn 37" which distance perniits'the pin 20 toco'm'e into engagement; either above. or below the:

' pin 21 therebyholding.the movement of'the bolt temp'or'arily stopped. -As'- I soon :as' a 40 temporary'closureis made by the distant [signal box during'its operation; armature-1'1 be attracted .b y m agnet 10, which will cause-projections. '20 and' 21 to become dis-- engaged, This permits sighal-liox A to'start- ;.again and 'during its operation the pin 19' "i become disengaged from the cam 37.

' If the circuit atthe distantibox isv again'open before thefirs't pro' 'otion 36 ugon the signal wheel 35, reachest epin 19, t epinlQwill f3l1 inside the .path oftheprojections 36,

thereby-lettingihelarmature'11" fall out of.

the magnetic field of. the magnet 10 andrest- 1' on .the ad'usting screw .131. Ihis'condition' will exist during therei olution of the signal 5,) wheel 35 until 19-:con1es into engagement '-"'.with *c am'. 37, when it seen that the" armature 1 1. will be brought back into the" field of magnet 10 1f at that :time the circuit should he interrupt-edat a distant.

point, the operation on the next reroluti'on wheel 35 will .be-the'same as thenof the signal revious revolution; but if the circuitsho'uld iappen to he closed temporarily at thattime run into {our times sending-fin its signal each time and when it has; 251 completed its four-signals, the pin 32 fall" signal wheel3 1 8 control five. 7i '7 It willbe nals, that is, one box-may send in its call once and another box may then" stepin and send in its, call. "This. can not, however, be considered an inter-re tion or confusion for at no time can any'sing e signalbemutilated high numbers as there might l e-two boxes pulled ator about the same time for different happened that this arriveso as toperinit alternations, the second or silent box which would bejwaiting to persendin a signal until the linebecomes closed, If at such time the second box-'pullediwas at the finish of its fourth silent revolution andv with'its armature-11 l the magnet 10., it

attracted to magnet loin time tog-release its further precaution taken to;of vejreo'rne' closeness. of. operation fasf'follows: The" pawl p n armature 11' isffinallybrought into the field on accountofthe, circuit being closed 38 will release lever 28,1butnot-beforepawl exactly the some timeis. not similar to all rial-wheel in ,thefirst number of-the signal which will open the -'.cireui pin, {19 of the box. A" will be'drawn within the 3 and the box'A will continue to operate with- -out any electrical effect as. before described-.- H the circuit becomes disturbed for .a lgnger'period than that 'whichis' required to 'send: a signal, such as an caused-by an accident blowing out of afuse for a period long enouglito permit pin 119--to he is pulled this-time, the box'would of] the circuit and send in its. signal thirtyseen that in signal: apparatus of this character, thgreis" an-irnriortant possibility of two lmxes .'alternat1ng between'sig-- nals is a great advantage when signal boxes form service would continue in its efiort' to ingout of the fielilof. e seen that lever28 of? that box'will be lying. above the pawl 388ml since theflrmaturefl l -of that box-fill not he lug 26. l?resum'ing that t e circuit, hasi-an- 27 will be in adwance position 'caused "by forcing; it. forward-so.- that."when of magnet-'10 and is fully attracted thereby" pa l-2' .permitstheboxes to proceed and send in j- 105 'The operation" of two bo'xesbeing'both'at it ad'gtant' point will cause any other boxto I ht itself outfof electrical operation; thus if the circuit is closedinboxA when the space between the third and fourth projection .36 i is passing and at that time the circuit is open.

number fiftyethree, the

innercircle described by the-projections 36 at headquarters, alterations or repairs and-a {he.possihilit yf of thealternations ofsig-v iires atdifi'erentlocations. If it so period of duration did not lever" 28 tel stop operation of thebox;

27 has reaehedand rides-uponilugfliif: This I other boxes of this'charact'er, the one having the largest points. oi interruption on its sig-1 t during operation 1 interruption ire". .will take precedence of'thebox with a lower ;1 I first numberjforthe reason that any-box liflfilil, is a closed circuit which ishiosnt s signs-l wheel which permits.

has been'tlie practice in no1 i-intcrl'eri v alarm systems to use open circuit signal is greatly to *bedesired for the To of signals bypreventing th ning its electrical-operatic ally released until a distant box already in operation has almost covered the entire dis- I tztncc of the pause between rounds. My box will not interfere with boxes upoi'i the some Such movement does IlOll tLliG the armature 11 out oi" the magnetic field of the magnet 10 and therefore when the oircuit has been restored the armature l 3. will be attracted by the nmgnct l0 disengaging the projections 20 and 21 and permi ting the box to send in its signal.

it tote noted that the s'gnal wheel of gnu-l wheel, by

the circuit t-obc clo; 2d. during-)1" tween. numbers and lictwee I open circuit signal wheel 18 shown m Fig. 2.

'By such a wheelthe circuit is kept open between numbers and also between signals. It

" inc wheels. By my invention, however, I am able to uses closed circuit signal. wheel in such systems. A closed circuit signal. w 1961 son that a used at simpler receiving apparatus may thecentral station for producing arecord in which the signal is represented bycharccters as distinguished from space. liurtherniiore, a closed circuit signal wheel can be used in connectionwith any control. station receivingapparatus which will receive the signals from. on open signal wheel. in my apparatus 1 seci e non-interfercnci-z b on from begin- .fter being in anu- "linceven though such boxes be interfering boxes using closed or open circuit signal wheelsund ordinaryrecording apparatus at the control station but will work in harmonyv with such-'apparstus cutting itself out if a distant interfering box is already in operw,

" 'tion and cutting itselfout in case it is started Vii ht the some time an interfering box. If on interfering box ispulled whilem y box is in operation, theworst that happen is the signal.

mutilation of. one signal since my box will cut itself but of operation in case of interferonce and will lat-ergo on and send in its"own My box will also Work in perfect harmony on s ClTCUlhJVll/li boxes using open "circuit wheels and their specially designed "central station receiving apparatus. in

"either case the 'nondnterfering feature maintained whether a closed circuit Wheel 0 open circuit Wliiul is used.

' The purpose of the com ll is to prevent the armature 11 from being fully attracted so as to cause the pawl 38 to release the lever 28 in time for pawl 27 to engage end of lug 26 in case on audible round of box B terminates While the pin 15) of bo-XA is within the cam 41.

2 shows on open circuit signal wheel. lln this figure 36 and 36* are the projections engaging the pin l9. T he projections 36 are extended, one of them holding'the circuit open durii the whole period after the third interruption until just before the fourth intm'ruptiou. The second holds the circuit open from the time of the last inter luption until the signal wheel reaches its normal position. This signal Wheel can be substituted for the signolwheel 35 of Fig. =1 il desiimhliiut as hove stated my invention is particililspiy kids pted and intended to per mit the use ofclosed circuit, signal wheels with their many ad ant-ages. With 0 on signal wheels, the box having a higher first number is the one winch. cuts itself out automaticallywhentwo hoxes are started at the some time, since the circuit would be vclosed at such a box when open at the between ninnber interval of c box having a smaller first number; When the wheel 35 is in normal position the distance between the pin 19 and the first projection 36 is greater than. the distance between the pin 19 and the lsstprojcction 36. The time that it takes For the first projection 36 to reach the pin-'19 is known as the delay of the box. T his delay is longer than any pause between numb ers and more than half as long as the pause between rounds or signals. This long delay in my be; prerents one box from mutilsxting the signals of another box.

i s t ll'clsim is: I

'lhe conihinotion of a closed circuit signal wheel, a non-interfering magnet, on armsturo therefor, it controller connected to said armature and actuated by said wheel, and

circuit coutucts in series with said magnet oiled hy siiid. controller.

and cor no] wheel, u controller actuated thereby, circuit contacts controlled by said controller,

. no combinotion'of a closed circuit sigon. armature connected to sold controller, a;

magnet for said armature in series with said said miniature from the'ronge' of the normal contacts and means tending to withdraw;

lield of said magnet, and remove the controller lroin the range of'the signal Wheel. 3. The comb-motion ot mtrsnsmission cirouit, separable contacts therein, t controlling memf'oer for disengaging said COlltfiCtSylsignal wheel for actuating said member, on armature to which the controlling member. is yieldingly connected, a magnet attracting said armature upon the closing of said circuit when sold. armature is within the'field of fsaid magnet, means foriwithdrawin'g said "qarmature,;from' the. normal range of said na'l iwheel for actuating. said'member, an

5' field, said. signal wheel having projections engaging isaidcontroljhng memb erwhen said armature is within said field, said controlling member being out of range of said projections when said armature is out of said field. 4. The combination of a transmission circuit, separable contacts therein, a controlling member for disengagingsaid contacts, a sig-' i armature to" whichthe controlling member *isy eldlngly connected, a magnetattracting said armature upon. the .closin of said cir} 01111; when said armature is within the field of said 'magnet, means for withdrawing .said

armature from normal range of said Ifielcl,

-' said signal .wheel having projections engagwhen removed therefrom.

ing sa d controlling. member-when said ar-- mature-is within thefield, said controlling member-being out change of said projec tions-when said-armature is outof'said field,- said signal wheel-having also a. cam: surface for returning 'saidarmature to said :field 5. The combination of a transmissionoll"- cuit, separable contacts therein, a controlmember for disengaging said contacts, a' ergnalfwheel for actuating said member, an

armature towhich the controlling member is yieldingly connected, a magnet attracting said. armature upon'the closing of said circuit whensaid armature is within the field of I said magnet, means for withdrawingsaid armature from the normal range of said field, said signal Wheel having projections engagmg said controlling member when said arma-- time .is within said field, v said 'controlling member being out ,.of range of said-projectionswhen saidarmature is out ofsaid field,

said signal wheel'having a projection which when the wheel is in normal position holds said armature within the range ofthe normal field of said iS. denergized.

6\ The combination of a transmission cirmagnet when said magnet cuit, separable contacts-therein, a controlling member for disengaging said contacts, a

signal Wheel for actuating said member, an armature to which thecontrolling member is yieldingly connected, a magnet attracting said armature upon the closing of said circuit when said armature is within the field of saidmagnet, means for withdrawing said armature fromthe normal range of said field,

said signal wheel having projections engag' ing said controlling member when said arina-i ture is within saidfield, said controlling member being out of range of s'aid projections when'said armature is out, of said field, said signal wheel having also a cam surface for moving said armature into said field when removed therefrom and 'a PIOJBGtlOIl which when the wheel is in normal'positicn holds said armature within range. of th e normal v field of said magnet when deen'ergiaed.

said armature upon the closing of'saideirsaid magnet is 7. The combination of a transmission cir' cuit, separable contacts therein, a control-.

ling member for disengaging said contacts, a signal wheel for actuating said member, an armature to which the controlling member is yieldingly connected, a magnet attracting said armature upon'the closingof said cir 'cuit when said armature iswithin the field of said magnet, means for withdrawing said armature froni'the normal range of said field,

said signal wheel having projections engagmember being out of range of said projections when said armature is out of said field,

a pawl'for controlling the train driving said signal, wheel, means for withdrawing said pawl and a detent carried-by said armature ing saidicontrolling member when said armatureis within said field, said controlling and restraining said pawl when said pawl is lifted at a time when the armature-is with drawn from said magnet.

8. In a combination of a transmission circuit, separable contacts therein, a controlling member for disengaging said contacts, a signal-wheel for actuating said member, an" armature to which the controlling member is yieldingly connected, a magnet attracting cuit, when said aimatnreis within thefielld ii" of said magnet, means forfwithdrawing said armature from the,norrnalrangepfsaidfield,

said signal wheel having projections engag ing said controlling member when said armature is within said field, said controlling member being out of range of saidprojecdriving train therefor, an armature to which the. controlling member is yieldingly- 'connected, a magnet attracting said-armature upon the closing of said circuit when said armature is within the field of said magnet, means tending to withdraw said armature from the normal range of said field, said signal wheel having projections engaging said controlling member when said armature is within said field, said controlling member being out of range of said projections when said armature is out of said field, said signal wheel having a stop projection which when the wheel is in normal position is engaged by said controller and holds said armature within the range of the normal field of said 7 magnet when said magnet isdenerg1zed,,

s1. sod controlling member when said armature said controlling member having means for bloeking said train when engaged by said last named projeotion.

10. The combination of a, transmission circuit, separable contacts therein, e controi-' liog momber for disengeging said contacts, e signal wheel. for actuating said member a riving train therefor, en ermetmye to which the controlling member is connected, 5:, msgoet etti'eoting seid armature upon the closing of seid circuit when said armature is Within the field'ol aid magnet, mes-es for Wit-l1- dmwing said armature from said field, said eel heel projections engaging is within said field, said controlling member being out of range of said projections when said armature is out of said field, said signal wheel having it projection which when the Wheel is in normal position holds said ormetore. within the tango of the normal field of said magnet when said magnet is denergig Jed. said: controlling member having means ior blotng seid train when engeged by said 155- giegm'ed projection, sold signal wheel also list mg l P-TGIGOLiOIL holding seid armature away l t-om said mi-gnet but 111 aposltion whose said controlling member does not block said train.

11. The combination of e transmission circuit, separable cont-sets therein, a controlling member-for said (3011 teats, e signal wheel 5 1 ting said member, an itllliittlll'e to which the controlling member is yieldingly connected, at magnet attracting sold armature upon the closing of said. eireuit when said armature s Witl'un the d of said magnet, moons for Withdrawing d oil-mature from the normal rouge oi seid. field, said s; tool wheel liming prieotions engaging said controlling member when said armature is within said field, said controlling member being out of range of-smd. projecuons when said armature is out 0i. said field,

\ a, pawl for controlling the train driving said signal wheel, means for withdrawing said pawl, end adetent carried by said moisture and restmi log said pawl when Sitlfl pawl is lifted at it time when the armature is with- (,lltt'xVll from said magnet, said signal Wheel 3 contacts controlled byseid eon" 'of'the signal Wheel being longer position et'nmture therefor, 21, sired-it 35;

having a stop projection adapted to hold the armature within the normal range of the field of said magnet when the controlling memlm' of 1-; id mogjgnot, sod" remove r from ereoge of the si ns-1 of the-signal Wheel. oomg loo; pause between numbers. I

13. The eombmetion of :1 circuit s1 .1 4. n 520x heel, eoonuio. e1 eotuejoo. some L oll'er, on lneture connected to said Controller a- 1n mg net for said armature in series with said eon taets, and means tending to withdraw sold armature from the range olthe normal field of said magnet, and remove the oontrolley the delay y then. the pause between numbers and more than half as long as the peuse between remade or signals. e

1%. The combination of e imag ne l1, three from the l eiige of the signal Wheel,

wheel, zt'oontrol-ler actuated thereby and m neeted to'seid armature, said sig xisl having signal projections eetunti troller when said moisture is in s, sltion, said signal wheel when l m. deeoergized tit-times permitting sei tore to be only slightly Witlulrevm from magnet and retaining: it withdrawn mt-bio renge' of thenoi'mel field of said most 1.0 l1, end

at other times to be ivii-lidrewn lmnrtl e serouge of said nor-moi field, circuit cont controlled by said,controller end in sui s Wl th said magnet, and meeios tendin to Wl drew said armature from the normal field of said magnet and the controller from. the range of the pro ections on. szud signal wheel.

. flLLlAR l .l-i. KIRNA'N.

V iisowrzisLL, M. GARRETT. 

